Linear motor

Abstract

In a linear motor ( 1 ) having a stator ( 2 ) and an armature ( 3 ), the stator ( 2 ) comprises a winding former ( 21 ) and a drive winding ( 22 ) provided on the winding former ( 21 ). Further, means are provided for preventing any contact between the drive winding ( 22 ) and the armature ( 3 ) in case the armature ( 3 ) penetrates through the winding former ( 21 ).

1. A linear motor having a stator and an armature, with the stator having a winding former and further having a drive winding arranged on the winding former, wherein means are provided for preventing any contact between the drive winding and the armature in the case of the armature penetrating through the winding former. 
     
     
       2. Linear motor according to  claim 1 , wherein the means for preventing any contact between the drive winding and the armature comprise at least one sensor winding which is arranged between the winding former and the drive winding. 
     
     
       3. Linear motor according to  claim 2 , wherein the at least one sensor winding comprises exactly one sensor winding which is wound in one layer and extends in an axial direction. 
     
     
       4. Linear motor according to  claim 2 , wherein the at least one sensor winding comprises a first and a second sensor winding, with the first and second sensor windings each being wound in one layer and extending in an axial direction, and with the winding wires of the first and second sensor winding being alternately arranged in an axial direction. 
     
     
       5. Linear motor according to  claim 2 , wherein the at least one sensor winding comprises a first and a second sensor winding, with the first and second sensor windings each being wound in one layer and extending in an axial direction, and with the two sensor windings being arranged coaxially to one another. 
     
     
       6. Linear motor according to  claim 2 , wherein a protective layer against mechanical damage to the drive winding is provided between the at least one sensor winding and the drive winding. 
     
     
       7. Linear motor according to  claim 6 , wherein the protective layer comprises a flexible printed circuit board upon which the at least one sensor winding is applied. 
     
     
       8. Linear motor according to  claim 7 , wherein the at least one sensor winding is provided in the form of conductive tracks on the flexible printed circuit board. 
     
     
       9. Linear motor according to  claim 1 , wherein the armature is an internal armature. 
     
     
       10. Linear motor according to  claim 1 , wherein the at least one sensor winding comprises a first and a second sensor winding, with the first and the second sensor windings being arranged opposite each other externally of the winding former. 
     
     
       11. Linear motor according to  claim 1 , wherein the contact occurs from transverse forces acting on the armature.